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How to handle springboot-yml file with oracle database?

User_IU1HBDec 3 2021

When the spring boot project configures the Oracle database, an error is reported when running the spring quartz:
close statement error
Java.sql.sqlrecoverableexception: closed connection
at oracle.jdbc.driver.PhysicalConnection.needLine(PhysicalConnection.java:4220)
at oracle.jdbc.driver.OracleStatement.closeOrCache(OracleStatement.java:1431)
at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:1410)
at oracle.jdbc.driver.OracleStatementWrapper.close(OracleStatementWrapper.java:102)
What is the reason? SQL can execute normally after an error is reported.

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Added on Dec 3 2021
#database-connectivity-discussions
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